Kowada
Kowada, Akiruno city, Tokyo, Japan
Occurrence
Sediments subjected to diagenesis
Carbonate nodules included in Miocene Kosho Mudstone Member.
Outcrop of Kosho Mudstone Member. The outcrop is composed of black mudstone showing clear stratification with a slump structure. Siderite-calcite nodules with a lamellar structure are very rarely observed and was described as fossile stromatolite. The scale coin is placed at a little below the center.
Reported Minerals
- Siderite
- Calcite
Mineral Assemblages
- Siderite - Calcite
Localities
- Kanuma (Weathered pumice, Imogilite)
- Bushi (Trace fossil, Siderite)
- Kowada (Nodule, Siderite)
- Nohori (Trace fossil, Vivianite)
Related Occurrences
- Albite-Epidote-hornfels facies
- Hornblende-hornfels facies
- Pyroxene-hornfels facies
- Sanidinite-hornfels facies